Mounting for rotatable gas burner



Feb.

Filed March 10, 1953 United States Patent O MOUNTING FOR ROTATABLE GAS BURNER John E. Chambers, Shelbyville, Ind., assignor to Chambers Corporation, a corporation of Indiana Application March 10, 1953, Serial No. 341,569

2 Claims. (Cl. 126-39) The present invention generally relates to cooking stoves and more particularly relates to a mounting for a rotatable gas burner unit.

The mounting of the present invention is particularly designed for use with a rotatable burner assembly which includes a plurality of gas burner units disposable in a vertical storage position within a housing when not in use. The units are supported on separate mountings which are fixed to the floor of the housing opposite respective openings in the front wall thereof. When it is desired to use one of the burner units, a door opposite such unit covering one of said openings is opened and the associated burner unit is rotated on its mounting into a horizontal operating position.

The mountings on which the various burner units are rotatably supported should be of such construction that they may be inexpensivelyconstructed, and may be readily attached to the floor of the burner housing. Further, the mountings should prevent lateral movement of the burner units supported thereon and should firmly support the mixing bell portions of the burners mounted thereon in such manner as to avoid transfer of force to the stationary gas nozzles or mixer pins which are mounted opposite the open ends of the mixing bells. It is also desirable that each mounting includes means for supporting the associated gas nozzle so that a simple unitary structure results which may be inexpensively and conveniently assembled at one location and shipped to another location where the complete burner unit is assembled.

It is often necessary that the burner units be removed from their mountings for cleaning or other purposes. A desirable requirement of a rotatable burner mounting is therefore that the associated burner unit be quickly and easily disengageable from its support mounting, preferably without the use of any tools. The mounting of the present invention fulfills all of the above described requirements with a construction which is simple and inexpensive.

In accordance with the present invention, a cradle for a rotatable gas burner unit is provided having spaced bearing surfaces formed by the upturned ends of a horizontal base plate. One of the bearing surfaces is formed by the walls of an open-ended, U-shaped slot made in an upturned flange at one end of the base plate. The other bearing surface is formed by the opposed curved surfaces of a pair of separated upturned ears formed on the opposite end of the base plate. The curved surfaces on the opposed ears together with the curved bottom portion of the U-shaped slot in the said upturned flange provide coaxial bearing surfaces on which the cylindrical stem of a burner unit may readily be rotated. This construction enables the burner unit to be simply lifted out of engagement with the cradle structure forming the novel mounting of the present invention without the need of any auxiliary tools.

A more complete description of the construction of the present invention by which the above mentioned ad- 2,782,779 Patented Feb. 26, 1957 ICE vantages are attained may be obtained by making reference to the following specification, taken in conjunction with the accompanying drawings in which:

Fig. l is a perspective view of a rotatable burner unit mounted in a vertical position supported on the novel mounting of the present invention;

Fig. 2 is an exploded view in perspective of portions of the burner and of the cradle support or mounting shown in Fig. 1; and

Fig. 3 is a fragmentary horizontal sectional view of a portion of the burner neck and cradle taken along section plane 33 in Fig. 1 illustrating the relationship between the annular groove in the burner stem and the U-shaped slot in the cradle flange.

Referring now to the drawings, numeral 4 indicates generally a rotatable gas burner unit mounted on the novel cradle or mounting, indicated generally by numeral 5. The cradle 5 may be mounted on a horizontal surface, such as the floor of the housing in which said burner assembly is mounted.

The gas burner unit 4 includes a cooking top 8 fixed to and, when in use, overlying the burner portion of the unit, indicated generally by the numeral 9. The cooking top is provided with a drip pan 10 which is preferably made integral therewith. The burner 9 has a neck 11 which includes a stem 12 and a hollow shaft or conduit 13 which connects the stem to the chimneys of the burner, one of which is indicated by numeral 14 in the drawing. The chimney protrudes through an opening in the cooking top 8 in a conventional manner.

The stem 12 of burner 9 has a mixing bell 15 at one end thereof, the bell having a central opening 16 for the entrance of gas and a pair of arcuate openings 17 and 18 for the entrance of primary air to support combustion of the gas at the burner chimneys.

The openings 16, 17 and 18 communicate with a passageway within the neck of the burner which in turn communicates with the chimney portion of the burner in a conventional manner.

Mixing bell 15 has an enlarged cylindrical portion 19 at its outer end. A tapered wall 20 joins the cylindrical portion of the mixing bell to the main body portion of the stem 12, which has a cylindrical extension 12a of smaller diameter. The opposite end of extension 12a has an annular groove 21 for purposes which will be hereinafter explained.

The cradle 5 is formed from a single sheet of material, preferably metal, and includes a horizontal base plate 22, an upturned flange 23 at one end of the base plate, and a pair of separated upturned ears 24 and 25 near the opposite end of base plate 22. A U-shaped slot 26 is formed in upturned flange 23, which slot is open at the top to receive the portion of stem 12 of burner 9 defining the bottom of annular groove 21. The bottom of slot 26 is arcuate to provide a suitable bearing surface. The width of groove 21 is made approximately equal to the thickness of flange 23 of cradle 5 so that the groove will fit into the slot 26 for rotary movement therein. The end of stem extension 12a overlaps the portion of flange 23 adjacent slot 26 to prevent axial or lateral movement of the burner relative to cradle 5. This construction is most clearly shown in Fig. 3.

The opposed surfaces of cars 24 and 25 have respective arcuate surfaces 26 and 27 which lie along a circle which is coaxial with and of larger radius than the curved surface on the bottom of slot 26 in cradle 5. These arcuate surfaces provide a smooth bearing surface on which the cylindrical rim 19 of mixing bell 15 may pivot.

Extending between ears 24 and 25 is a tongue 28 which is preferably integral with the single sheet of material from which the cradle structure is formed. The end of the tongue 28 is bent upward and then backward to form a C-shaped bracket, indicated generally by the reference numeral 29, said bracket having a vertical arm 30 and an upper horizontal arm 31. Arm 31 is slotted at 32 to receive the neck of a gas connector unit indicated generally by reference numeral 33. Connector unit 33 has a hollow L-shaped neck 34 and a hollow head 35 having a gas discharge nozzle or mixer pin 36 connected to the end thereof. A gas conduit 37 connects with neck 34 of connector unit 33 and feeds gas through the passageway formed by the hollow portion of the connector unit to an opening (not shown) in the end of nozzle 36.

Bracket 29 supports the connector unit 33 at a level such that the nozzle 36 is coaxial with bearing surfaces 26 and 27 and freely extends into the central opening 16 of mixing bell 15. Gas discharged from nozzle 36 readily enters the passageway in the neck 11 of burner 9.

The cradle supports the entire weight of the burner unit 4 so that no force is transferred to the connector unit 33 or nozzle 36.

The single piece construction of the cradle 5 results in low manufacturing costs, and ease of assembly with the associated apparatus. The burner is readily removed from the cradle 5 by tilting the stem of the burner opposite the mixing bell upward, and then pulling and then lifting the mixing bell end of the stem away from the nozzle of the connector unit.

It should be noted that any suitable rotatable gas burner unit may be used with the mounting construction of the present invention. Further, numerous modifications may be made of the specific and preferred disclosed embodiment of the present invention without deviating from the broad, generic aspects of applicants invention.

Iclaim:

1. In combination, a support for a rotatable gas burner and a gas nozzle for directing gas from a supply line to said burner, said burner comprising a horizontal plate member, an upstanding flange on one end of said horizontal plate member, said flange having a vertical U- shaped slot with its open end facing upwardly, the said slot forming a bearing surface adapted to receive one end of the neck portion of a gas burner, the other end of said horizontal plate member having upstanding ears formed from the same sheet of material as said horizontal plate member, said ears having upper surfaces defining curved bearing surfaces coaxial with said first mentioned bearing surface, said second mentioned hearing surfaces being adapted to receive the other end of the neck portion of a burner, and a tongue extending between said ears and bent upward at the end thereof to form a support bracket for a gas nozzle for directing gas to the gas burner, said gas nozzle supported by said bracket and orientated coaxially of said bearing surfaces so as to extend into a central opening in the end of the neck portion of a burner unit to be supported on said bearing surfaces.

2. In combination with a gas burner and a gas nozzle for directing gas from a supply line to said burner, said burner having a hollow neck for carrying gas to the chimney of the burner, said neck having a cylindrical end portion provided with an opening therein and an extension coaxial with said cylindrical end portion, said extension having an annular groove therein, a support for said burner and nozzle, said support comprising a bearing surface rotatably supporting said cylindrical end portion of said burner neck, a second bearing surface coaxial of said first mentioned bearing surface and formed by a vertical flange having a arcuate slot therein for the annular groove in said extension of the burner neck, the width of said annular groove being approximately equal to the thickness of said flange whereby axial movement of said burner relative to said support is prevented, and a tongue extending outwardly of said first bearing surface, said tongue being bent upwardly at the end thereof to form a support bracket for supporting a gas nozzle aligned with said hollow neck and extending into said opening.

References Cited in the file of this patent UNITED STATES PATENTS 1,322,831 Seiss Nov. 25, 1919 1,431,662 Horning Oct. 10, 1922 1,792,570 Breuer Feb. 17, 1931 2,578,227 Chambers Dec. 11, 1951 FOREIGN PATENTS 18,638 Great Britain Aug. 18, 1911 303,540 Italy Dec. 6, 1932 

